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Mend Worcester Bosch Greenstar Heating System Boiler

Keep getting F5 lockout even after reset, once water used F5 comes back?

I have reset the PCB but still goes into F5 when boiler turns off.

chris palmer
April 2014
Worcester BoschWorcester Bosch GreenstarHeating, Home Heating SystemsWorcester Heating System Boiler

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